Fix sigma adjustment for Blur Mapped Composition

diff --git a/magick/composite.c b/magick/composite.c
index db6f048ad10004974efd831684b09427e3bec3bc..abba2e4083f2002923b06c8068f4e273641b46fd 100644 (file)
--- a/magick/composite.c
+++ b/magick/composite.c
@@ -1761,7 +1761,7 @@ MagickExport MagickBooleanType CompositeImageChannel(Image *image,
       pixel=zero;
       exception=(&image->exception);
       resample_filter=AcquireResampleFilter(image,&image->exception);
-      SetResampleFilter(resample_filter,GaussianFilter,2.0);
+      SetResampleFilter(resample_filter,GaussianFilter,sqrt(2.0));
       destination_view=AcquireCacheView(destination_image);
       composite_view=AcquireCacheView(composite_image);
       for (y=0; y < (ssize_t) composite_image->rows; y++)